Cavity-Mediated Entanglement Generation Via Landau-Zener Interferometry

Abstract

We demonstrate quantum control and entanglement generation using a Landau-Zener beam splitter formed by coupling two transmon qubits to a superconducting cavity. Single passage through the cavity-mediated qubit-qubit avoided crossing provides a direct test of the Landau-Zener transition formula. Consecutive sweeps result in Landau-Zener-Stuckelberg interference patterns, with a visibility that can be sensitively tuned by adjusting the level velocity through both the non-adiabatic and adiabatic regimes. Two-qubit state tomography indicates that a Bell state can be generated via a single passage, with a fidelity of 78% limited by qubit relaxation.

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• Quantum parameter estimation with the Landau-Zener transition
• Quantum integrability in the multistate Landau-Zener problem
• Exact results for models of multichannel quantum nonadiabatic transitions
• Accelerating adiabatic protocols for entangling two qubits in circuit QED
• Landau-Zener-Stückelberg interference in a multimode electromechanical system in the quantum regime
• Landau-Zener transitions mediated by an environment: population transfer and energy dissipation
• Observation of coherent oscillation in single-passage Landau-Zener transitions
• Quantum simulation of Kibble-Zurek mechanism with a semiconductor electron charge qubit
• Photon-assisted Landau-Zener transitions in a periodically driven Rabi dimer coupled to a dissipative mode
• Amplitude tuning of steady state entanglement in strongly driven coupled qubits
• Generalized Adiabatic Impulse Approximation
• Coupled Landau-Zener-Stuckelberg Quantum Dot Interferometers
• Alternative fast quantum logic gates using nonadiabatic Landau-Zener-Stückelberg-Majorana transitions
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• Exact Classification of Landau-Majorana-Stückelberg-Zener Resonances By Floquet Determinants
• Nonadiabatic population transfer in a tangent-pulse driven quantum model
• Control of spectroscopic features of multiphoton transitions in two coupled qubits by driving fields
• Proposal for a transmon-based quantum router
• Exact transition probabilities for a linear sweep through a Kramers-Kronig resonance
• Vibration multistability and quantum switching for dispersive coupling
• Dynamics of dissipative Landau-Zener transitions in an anisotropic three-level system
• Dissipative Landau-Zener tunneling in the crossover regime from weak to strong environment coupling
• Maximally entangled Rydberg-atom pairs via Landau-Zener sweeps
• Symmetry-protected Landau-Zener-Stückelberg-Majorana interference and non-adiabatic topological transport of edge states
• Loss-induced quantum nonreciprocity and entanglement in superconducting qubits
• Anomalous dynamical evolution and nonadiabatic level crossing in exactly solvable time-dependent quantum systems
• Efficient steady state entanglement generation in strongly driven coupled qubits